Williams and promoter Live Nation are on the receiving end of a class action lawsuit filed by Brian Herline on behalf of everyone who went to see the comedian "perform" on November 16.

According to the lawsuit -- filed on the day before Thanksgiving in Alameda County, CA -- Katt's show ended after just 10 minutes ... but not before he "confronted a heckler, took his clothes off, and attempted to fight at least three audience members."

The suit is seeking unspecified damages for "Katt Williams' non-performance."